Sole-rounding machine



{No Model.) 2 SheetsSheet 1.

L. E. ERIOSON.

SOLE ROUNDING MACHINE.

Patented May 5, 1896.

LEWIS E. ERIOSON, OF BOSTON, MASSACHUSETTS.

SOLE-ROUNDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 559,57 5, dated May 5, 1896.

Application filed August 16,1895.

To all whom it may concern:

Be it known that I, LnWIs E. ERIOSON, of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Sole- Rounding Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention has for its object the production of a sole-rounding machine whereby soles of various lengths may be rounded without necessitating the employment of a series of controlling-cams for directing the movement of the knife or cutter.

I-leretofore when soles of different lengths were to be rounded a different controllingcam had to be put in place, causing considerable delay and trouble, reducing the output of a machine, and increasing the cost, due to the series of cams which had to be employed.

In this myinvention I have provided means whereby a single controlling-cam suffices for soles of various lengths, the cam being moved automatically in one direction or the other longitudinally of the sole and with or opposite to the movement of the knife or cutter, according as the sole is longer or shorter than the length of sole to be rounded when the cam is held stationary.

Figure 1, in side elevation,represents a sole rounding machine embodying my invention. Fig. 2 is a longitudinal sectional view thereof on the irregular line 09 :0, Fig. 1, looking down. Fig. 3, taken below the line 00 m, Fig. 1, and broken out, represents the rotary carrier with the controlling-cam beneath. Fig. 4 is a detail of the connection between the main driving-shaft and the cam-actuatin g devices; and Fig. 5 represents, on an enlarged scale, a side elevation and end and plan views of the slideblock which carries the knife or cutter.

Referring to Figs. 1 and 2, the main frame A, having bearings to support the drivingshaft B; the belt-pulley B, normally loose on said shaft and adapted to be connected thereto by a clutch O, operated by a suitable handlever O; the bevel-gear 1), fast on the main shaft and meshing with a gear 01 on the r0- tary carrier D, mounted to rotate on a stud d, secured to the main frame A; the presser P, pivotally connected to a plunger 1), nor- Serial No 559,500. (No model.)

mally upheld by a spring S in the overhang ing arm A, and the depressing-lever 1), Op erated by means of a link 19 connected to a treadle T, may be and are all substantially as well known in machines of this class.

The carrier D is provided in its upper surface with a radial undercut groove d extending from its circumference toward its center and slot-ted for a portion of its length, as at (i Fig. 2. A slide-block c rests in and is longitudinally movable in the undercut groove C1 and a spindle e is passed loosely through the block and secured at its upper end, as by screws 8, to a second block f, which rests upon the top of the carrier D.

At the lower end of the spindle e is secured, or forming a part thereof, a cross-piece 6 supporting depending and, preferably, rollerstuds a one at each end of the cross-piece, for a purpose to be described, the spindle passing through the slot (1 in the carrier.

The block f, which may turn relatively to the slide-block e on the spindle c as a center, is longitudinally grooved at f the edges of the groove being preferably undercut, as clearly shown in the drawings. In this groove is. held the knife-slide g, provided with an upturned pivoted holder 9, in which the knife or cutter 7c is secured, the knife-slide being connected by a link 9 to an arm 9 pivotally mounted at its outer end on an offset f secured to or forming a part of the block f, a spring S, secured at one end to the offset, having its other end bearing on the arm, to thereby press the holder g of the knife-slide yieldingly against the pattern-plate.

On the top of the stud cl is secured a support d for the usual pattern-plate d preferably of metal, to guide the knife or cutter 7r, to trim the sole as the carrier moves the said knife around the edge of the pattern-plate.

In cutting the sole around the heel and too it is necessary to provide means for positively keeping the knife-slide substantially at right angles to the edge of the sole, and a cam is provided for this purpose, giving the slide a movement approximate to the contour of the sole.

The portion A of the main frame adjacent the stud d is extended horizontally at H to form a bearingfor the cam M, shown in Fig. 3 as provided with a continuous groove having straight parallel side portions 3 3 and like oppositely-curved ends 4 5, the cam being longitudinally slotted at m to admit the stud d, which latter is shown in Fig. 3 as grooved on opposite sides to receive the sides of the slot. Longitudinal upturned ribs or flanges h on the bearing 11 guide the cam when it is moved over the bearing, the latter being cut away at h to permit the free movement of an ear m on the cam.

The cam M is located directly beneath the carrier D, and the rolls 6 below the latter enter the cam-groove and control the movement of the block f about its center of motion.

When the cam M is in full-line position, Figs. 1 and 3, and shown in dotted lines, Fig. 2, it will be evident that a sole of a certain length may be rounded, provided the cam remain stationary, the movement of the knife k toward or from the center of the carrier D being controlled by the pattern-plate d as the carrier is rotated. Passing around the toe and heel, the rolls (2 in the groove of the cam M will, through the block f and intervening connections, maintain the proper angle of the block f relative to the edge of the sole, (not shown,) held down upon the pattern-plate by the presser P, such angle being as nearly a right angle as possible.

When a sole of different length is to be rounded, it is now common to substitute a pattern-plate of corresponding length and to use the cam for as many sizes as possible; but in so doing the cam is obliged to do work for which it was not exactly designed, and the cooperating mechanism is thereby cramped. The movable ends of a cam have also been adjusted; but I move the cam bodily and longitudinally as the carrier is rotated in one or the other direction, to correspond with the length of the pattern-plate then in use, a different pattern-plate being of course used for every different length or shape of sole.

If,for instance,a longer sole is to be rounded, when the corresponding pattern plate has been substituted the cam M is moved in the direction of the arrow 25, Fig. 3, supposing the carrier D to be moving in direction of arrow 30, the effect of such movement being to carry the end of the cam farther from the center of the carrier, as at M, (see dotted lines, Fig. 3,) so that the turning of the'knife about the heel end will take place later. After passing about the heel of the sole the cam M is moved forward until its left-hand end, viewing Fig. 3, will have taken the dotted-line position M to guide the knife around the toe.

If a very short sole is to be rounded, the stroke of the cam is reversed, so that as the carrier moves in the direction of the arrow 30 the cam will move oppositely to arrow 25, or toward the knife, and the heel end of the cam will assume the dotted-line position N as the knife is in position to pass around the heel of the shorter pattern-plate then used, and the heel having been rounded the cam will be moved back in the direction of arrow 25, bringing the toe end of the cam to dotted position N as the knife reaches the toe of the pattern-plate, it being understood that a different pattern-plate is substituted for each length of sole, as usual.

On the main shaft B is formed a worm 0, in mesh with a worm-gear 0, fast on a short shaft 0 rotatable in a bearing A of the frame, said shaft having fast thereon a disk 0 provided with a diametral undercut groove 0 in which is held a block 0 the block being clamped at any point in the groove by a clamp-screw 0 One end of a link 0 is pivoted to the block, the other end being pivotally connected to the ear m of the cam M, so that whenever'the block 0 is off center the cam will be reciprocated longitudinally by revolution of the disk 0 the length of the cam-stroke being controlled by the distance of the block from the center of the said disk.

For convenience a scale or gage S is indicated on the face of the disk 0 and a pointer 0 on the block 0 is adapted to cooperate therewith, the block being set at a particular graduation on the scale according to the length or size of the sole to be rounded.

The ratio of the worm 0 and gear 0 is the same as the ratio of the gear at and bevelgear 6, and with the parts in the position shown in Fig. 1 it will be obvious, if the carrier D is rotated in the direction of arrow 30 and the disk in the direction of arrow 40, that the cam M will be moved to the right, thus moving its heel end with the knife-holder, so that the latter will arrive at the turn 5 at a point farther removed from the center of the carrier than would have been the case if the cam had remained stationary. On the return stroke the same effect is produced for the toe end 5 of the cam, so that the toe and heel turns of the knife will be farther separated for a long sole, and for intermediate lengths the block 0 is set nearer the center of the disk 0 Now, if the block were set above the center of the disk, with the parts in the position shown in Fig. 1, the direction of rotation remaining as before, it will be clear that as the knife is moved to the right the cam will be moved to the left, so that the heel end 4 of the cam will be nearer the center of the carrier D, as, for instance, at N, (see dotted lines, Fig. 3,) and on the reverse stroke the toe end 5 will be in operative position at N A very short sole can thus be rounded, and if the block 0 is set at the center of the disk 0 no motion will be imparted to the cam M, and the length of the sole will then correspond to the full-line position of the cam. By thus operating the single cam I obtain the function of a number of cams of different lengths and attain in effect an expansible cam without recourse to the greater intricacyand expense involved in the use of an expansible cam.

My invention is not restricted to the precise construction and arrangement shown for operating the cam, for so far as I am aware it is broadly new to automatically move the controlling-cam to thereby enable soles of different lengths to be rounded.

I claim- 1. In a sole-rounding machine, a stationary pattern-plate, a trimmer-knife, a rotary carrier therefor to move the knife around the pattern-plate, a controlling-cam for the knife, and means independent of the pattern-plate to reciprocate the cam longitudinally to thereby vary the position of the heel and toe turning portions thereof relatively to the center of the carrier, substantially as described.

2. In a sole-rounding machine, a stationary pattern-plate, a rotatable carrier, a trimmerknife radially movable thereon, a controllingcam for the knife, means independent of the pattern-plate to reciprocate the cam as the carrier is rotated, and an adjusting device to regulate the length of stroke of said cam, substantially as described.

3. In asole-rounding machine, a stationary pattern-plate, a rotatable carrier, a knife radially movable therein, means to press the knife yieldingly to the edge of said patternplate, and a movable controlling-cam for the knife, combined With a rotatable disk, a link connecting said cam and disk, and means to adjust the point of connection of the disk and link, to vary the stroke of the cam, substantially as described.

4. In a sole-rounding machine, a movable knife-controlling cam, a rotatable disk having a diametral groove, a block adapted to be clamped in the groove, and a link connecting said block and cam, whereby rotation of the disk will reciprocate the cam, the stroke varying according to the position of the block on the disk, substantially as described.

5. In a sole-rounding machine, a patternplate, a knife-controllin g cam having straight, parallel side portions, and oppositely-curved ends, and means independent of said pattern-plate to move the cam automatically to regulate the position of the heel and toe turning portions thereof, substantially as described.

6. In a sole-rounding machine, a rotatable carrier having a radial and longitudinallyslotted groove, a slide-block movable in the groove, a second block swiveled thereto and provided With rolls, and a spring-controlled knifeslide longitudinally movable in said sWiveled block, combined with a cam located beneath the carrier and cooperating With the rolls, to control the swivel-block in its swinging movement, and means to move the cam automatically to adjust the heel and toe ends thereof, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

LEWIS E. ERICSON.

Witnesses:

JOHN G. EDWARDS, AUGUSTA E. DEAN. 

